For the registration and in case of theft a valid frame number is most important. The frame number can be found on a sticker, located on the downtube, in most cases in the vicinity of the bottom bracket. It is machine readable with a barcode scanner. On some frame there is an embossed number on the bottom bracket. This is not the STEVENS frame number and can be ignored for the registration of your bike (exception: If the number follows the below mentioned format with eg S16… and there is no frame number sticker on the frame). S-Pedelecs have their frame numbers embossed on the right side of the seattube, but the number does not begin with eg S15 but with WS4.

Since season 2008 the frame numbers mostly have a simple pattern:

in the first position there is always an upper case S

next 2 positions are always numeric (last 2 digits of the model year / season)

next 5 (seldom 3) positions are uppercase letters

at the end there are always exactly 4 digits

Thus the lenght of the frame number is usually 12 characters, somtimes only 10 chars (though there are some few bikes with other patterns).

In your own interest you should identify, note and enter the correct frame number